{
  "id": "2410.00144",
  "version": "v1",
  "published": "2024-09-30T18:34:30.000Z",
  "updated": "2024-09-30T18:34:30.000Z",
  "title": "High-temperature Superconducting Oxide without Copper at Ambient Pressure",
  "authors": [
    "S. Lin Er Chow",
    "Zhaoyang Luo",
    "A. Ariando"
  ],
  "comment": "Main: 14 pages, 6 figures; Supplementary: 13 pages, 9 figures",
  "categories": [
    "cond-mat.supr-con",
    "cond-mat.mtrl-sci",
    "cond-mat.str-el"
  ],
  "abstract": "The discovery of superconductivity in the Ba-La-Cu-O system (the cuprate) at the 30 K range in 1986 marked a significant breakthrough, as it far exceeded the highest known critical temperature ($T_c$) at the time and surpassed the predicted 30 K limit, which was thought to be the maximum before phonon-mediated electron pairing would break down due to thermal excitation. Despite recent successful observations of superconductivity in nickel-oxide-based compounds (the nickelate), superconductivity above 30 K at ambient pressure in a system that is isostructural and isoelectronic to the cuprate but without copper has remained elusive. Here, we report a superconducting $T_c$ above 35 K under ambient pressure in hole-doped, late rare-earth infinite-layer nickel oxide (Sm-Eu-Ca-Sr)NiO$_2$ thin films. Electron microscopy reveals a small thickness of ~2 nm of infinite-layer phase stabilised at present, which indicates a higher temperature superconductivity should be observable in clean bulk crystals.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-09-30T18:34:30.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "ambient pressure",
      "high-temperature superconducting oxide",
      "late rare-earth infinite-layer nickel oxide",
      "higher temperature superconductivity",
      "clean bulk crystals"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}